Start here · Essential guide
How to Read a Datasheet
A practical walkthrough of the usual datasheet layout, from the front-page summary to ratings, electrical tables, graphs and package drawings, and how to find what matters.
Engineering Fundamentals
Components and Datasheets
Reading datasheets and understanding common parts.
Absolute Maximum Ratings and Recommended Operating Conditions
Why datasheets list two separate tables of limits, what each one promises, and why designing a circuit close to the absolute maximum ratings is risky.
Choosing Components: Questions to Ask
A general checklist for component selection, from required function and electrical ratings to package, availability, cost and design margins, with questions to ask first.
Derating and Design Margins
Why engineers run components below their ratings, how derating and design margins protect against uncertainty, and a simple worked example you can check by hand.
Mechanical Drawings and Dimensions on Datasheets
How to read the outline drawings, dimension tables, tolerances and recommended footprints on a datasheet so the part you order fits the board you design.
Reading Graphs and Curves in Datasheets
How to interpret characteristic curves in a datasheet: check the axes, the test conditions and the scale, read values accurately and avoid treating typical curves as guarantees.
Resistors, Capacitors and Inductors Refresher
A refresher on what resistors, capacitors and inductors do, the basic relationships for each, and the key parameters you will find printed on their datasheets.
Understanding Typical, Minimum and Maximum Values
How to use the typical, minimum and maximum columns in a datasheet, why worst-case design matters, and a simple LED resistor example worked through by hand.
Related topics
More in engineering fundamentals
Requirements and Specifications Capturing what a system must do and proving that it does. Systems Thinking Seeing how parts, interfaces and feedback shape whole systems. Units and Estimation Working safely with units, magnitudes and quick estimates. Math Refreshers Short refreshers on the maths engineers use, with checked examples.